Air to Fuel Ratio (AFR)

Air Fuel Ratio, sometimes known as Lambda or Equivalence Ratio
is the most influential parameter affecting the emissions,
efficiency and driveability of spark ignition engines. The accurate
and tight control of AFR is mandatory in optimising an engines
performance. With this level of importance on a single parameter a
high quality AFR
analyser is a necessary component of any engine calibration,
testing, development or maintenance programme.